ABSTRACT
A universal quasi-chemical model (UNIQUAC) (Abrams and Prausnitz, 1975) has been successfully applied for the correlation of several LLE systems. This model depends on optimized interaction parameters between each pair of components in the system, which can be obtained by experiments. The UNIQUAC equation can be fitted to the experimental composition by optimizing the interaction parameter (aij and aji.). The optimized interaction parameters can also be correlated with temperature.
